Riveting implement.



No. 643,340. Y

J. w. HomPsoN.

RIVETING IMPLEMENT.

Patented Feb. I3, i900.

(Application led May 27. 1899.)

2 Sheets-Sheet I.

' (No Model.)

` v. lllll E IIIIIIIHIIIII .0MM/ML( @M No. 643,340. Patented Feb. I3, IQG.

' J. W. THOMPSON.

BIVETING IMPLEMENT.

(Application led May 27, 1899.) (No Model.) 2 SheetsSheet 2.

NTTED STATES PATENT OFFICE.

JOSEPH W. THOMPSON, yOF SALEM, OIIIO.

slvETlNc nu PLEM ENT.

SPECIFICATION forming part of Letters Patent N o. 643,340, dated February 13, 1900.

Application filed May 27, 1899.

To all whom t may concern:

Be it known that I, JOSEPH W. THOMPSON, of Salem, in the county of Columbiana, State of Ohio, have invented certain new and useful Improvements in Riveting Instruments, of which the following is a description.

The present invention is in some respects an improvement upon, and in other respects a distinct invention from, the type of riveter shown in my application, Serial No. 709,957, iiled March 21, 1899.

The object of the present invention is to provide a rivet-setting or eyelet-setting tool combining quickness of operation and simplicity in construction and operation and having the following advantages: No adjustment is required for diiferent thicknesses of leather or other material to be riveted. Uniforrnity is obtained in the work done and particularly in the amount the rivet-heads are sunk intoV the surface of the material riveted. Ordinarily if the neck of the riveting instrument springs away from the work the head of the rivet will fail to a corresponding amount in being properlyT sunk into the material unless, indeed, the riveting-plunger be permitted to project from its sleeve to compensate for such springing or yielding `of the instrument; but in such event there is danger of too much sinking of the head, especially if the material being riveted is soi't.

The nature of 1n yim provements will be best understood from'a description of the accompanying drawings, followed by an enumeration of the novel features in my claims.

Figure 1 shows one 'form of my improved riveteras seen in side View, partly broken away and in section to show details, the instrument being in the position for receiving the material that is to be riveted. Fig. 2 is a similar view showing the instrument during the riveting operation. Fig. 3 is a partial view showing the position of the parts at the end of the riveting operation. Fig. 4. shows a bottom view of the instrument. Figs. 5 and 6 show a side view and an end view of a modified form provided with riveting centering mechanism. Fig. 7 is a horizontal section through the centering mechanism, showing it in position to receive the largest size of rivet for which it is adapted. Fig. 8 is asimilar sec- Scrlal No. 718,504. (No model.)

Throughout the drawings the same letters of reference refer to the same parts.

Upon the stationary parts of the instrument is mounted a vertically-movable head A, carrying the riveting-point ct. The actuating-lever B is pivoted to the lower part of the head A and is provided with gear teeth or cogs which engage with a rack forming part of the plunger or ram C, as shown. Consequently the turning of the lever B upon its pivot forces the plunger C toward or from the riveting-point a to accomplish the riveting and withdrawing actions. Fast to the head A is the projecting guide a', against which presses the spring D, tending to hold. the head A in its lowest position and consequently `to clamp and hold the leather or other material to be riveted under spring-pressure beneath the riveting-point a. The spring D may be of suitable form, and I have shown it consisting of a stiff wire rod bent double and secured in position in the frame of the instrument. The vertical movement of the head A is guided by suitable channels in the frame F, and I also provide a guide-pin P, which slides through a sleeve in the frame, as shown.

In addition to the gear-teeth on the lever B, which engage with the rack-teeth on the plu nger C,the lever is provided with a fulcrum lip or toe b, which strikes and engages the surlface b in the frame F, or on the plunger C when the plunger is at its lowest position, when the handle of the lever is raised,and thereby forms a fulcrum (reacting directly or' through the plunger on thestationary part-s of the instrument) by which the head A is forced upward into the position shown in Fig. 1, raising the riveting-point a and permitting the rivet to be dropped into place and the materials placed in position for riveting. The lugb" on the lever B catches and engages a corresponding lug 19"" on the head A when the handle B is raised to its highest position, as shown in Fig. 1, and so holds the parts in their raised position, the slight resilience of the lever B permitting it to be moved sidewise to clear the lugs 5" whenever it is desired to force the lever downward. As soon as the lever is released the action of the spring D draws the head A downward, so as to'clamp the leather or other material to be riveted beneath the riveting-point a under the springpressure of the spring D. Further downward movement of the lever B forces the plunger upward, driving the rivet upward through the material and upsetting it against the riveting-point a. Stop P accurately limits the movement.

As in the employment of the instrument it is convenient to use various sizes of tubular rivets, and as they rest head downward upon the plunger during the riveting operation, it is desirable to have some means of centering the rivets in line with the riveting-point a, and this is accomplished by the mechanism shown in Figs. 6 to l0. I have shown this mechanism separate from the details of the simplest form of the instrument already described for the purpose of simplifying the description; but it must be understood that the centering mechanism is applicable to any such instrument. The centering action is produced by small vertical shafts S, fitted in corresponding recesses within the sleeve F', which surround the plunger C. When in position to receive the rivet, these shafts do not encroach upon the space allotted to the plunger, because they are cut away con centrically with the plunger, as clearly seen in Fig. 7. In order to center the rivet, the shafts S are turned simultaneously, so as to encroach upon the space allotted to the plunger and push the rivet-head toward the axial line of the plunger, assuming the position shown in Fig. 8 or some intermediate position between those shown in Figs. 7 and 8, if the rivet-head does not allow the shafts S to be turned fully to the position shown in Fig. 8. In order that the plunger may be moved forward without striking or interfering with the shafts S, it is cut away, as seen in Figs. 7 and 8, to allow sufficient clearance for the movement of the shafts. Each of the shafts has an outwardly-extending pin s,which extends loosely through a hole in a spring-collar T. The spring-collar T is actuated by the two springs V, so as to always tend to turn to the position shown in Fig. 8. Therefore the springs always tend to center the rivet by turning the shafts S, as shown in Fig. S. The rivet is put in place byrst raising the lever B, as shown in Fig. 5, then turning the collar T to the position shown in Fig. 7, dropping in the rivet head first, and then releasing the collar T, so that the springs automatically center the rivet.

Having now described my invention in its most approved form, I will briefly recapitulate its operation. When the leather or other material has been made ready for riveting, the handleBis raised and preferably caught at the highest position. The material is then put in place under the riveting-point a and the handle released to cause the head A to clamp the material, the rivet of course having been previously dropped into place and centered, if the instrument is provided with a centering mechanism. The handle B is then forced down, driving the plunger upward toward the riveting-point aand setting the rivet, after which the handle B is raised and caught in its elevated position, thereby raising the head A and releasing the riveted material.

I claim as the characteristic features of my invention the following:

1. In a riveting instrument, a frame or stationary member, a riveting-head movable in guides on the said frame, a riveting-plunger movable in guides on the said frame, an operating-lever pivoted to one and acting on the other of said head and plunger, means for limiting the movement of the plunger and causing the lever to react on the frame to raise the riveting-head, and a spring tending to draw down the riveting-head, substantially as set forth.

2. In a riveting instrument, a frame or stationary member, a riveting-head movable in guides on the said frame, a riveting-plunger movable in guides on the said frame, an operating-lever pivoted to one and acting on the other of said head or plunger, means for limiting the movement of the plunger and causing the lever to react on the frame to raise the riveting-head, and a catch for holding the said lever when the head is raised, substantially as set forth.

3. In a riveting instrument, a frame or stationary member, a riveting-head movable in guides on the said frame, a riveting-plunger movable in guides on the said frame, an operating-lever pivoted to one and acting on the other of said head and plunger, means for limiting the movement of the plunger and causing the lever to react on the frame and raise the riveting-head, a spring tending to draw down the riveting-head and a catch for holding the head in raised position against the action of said spring, substantially as set forth.

4. In combination in and with a riveting instrument, a plurality of spring-actuated centering devices for the rivets, embodying the following elements: a plurality of eccentrically-shaped rotary bodies set around the axial line of the plunger, and spring means for rotating the said eccentricallyshaped bodies, substantially as set forth.

5. In combination in and with a riveting instrument, a plurality of spring-actuated centering devices for the rivets, embodying the following elements: a plurality of eccentrically-shaped rotary bodies set around the axial line of the plunger, and a concentric sleeve or collar connected to turn the said eccentrically-shaped bodies, substantially as set forth. i

6. In combination in and with a riveting instrument, a plurality of spring-actuated centering devices for the rivets, embodying IOO IIO

the following elements: a plurality of eeoen- Signed this 15th day of May, 1899, at Salem, trieally-shaped rotary bodies seb around the Ohio. axial line of the plunger, and a concentric sleeve or collar connected to turn the said eo- I JOSEPH W' THOMPSON' 5 centrically-shaped bodies, and spring means Witnesses: for turning the said sleeve or collar, substan- W.- S. FAIRFIELD,

tially as set forth.

, AMos BURSON. 

